| SWShelby Welded Tube | Shelby | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| SVSherwood Valve LLC | Cleveland | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| SEStatoil - Eisenbarth Pad | Clarington | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| STSteel Technologies LLC | Willoughby | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| STSteel Technologies LLC | Ottawa | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| TFT&b Foundry Company | Cleveland | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TGTde Group INC (1318536280) | Solon | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| TAThakar Aluminum | Sandusky | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| TBThe Blanchester Foundry CO | Blanchester | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TGThe G a Avril Company Brass & Bronze Division | Cincinnati | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| TGThe General Casting Company - Toledo Street | Delaware | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| TLThe Linderme Tube Company | Euclid | OH | Primary Metal Manufacturing331420 | — | ◇ UNVERIFIED |
| TAThompson Aluminum Casting CO | Cuyahoga Heights | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| TCTimkensteel CORP - Faircrest Steel Plant | Canton | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| UAUnico Alloys INC | Columbus | OH | Primary Metal Manufacturing331419 | — | ◇ UNVERIFIED |
| UCUS Casting | Canton | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| VWVictory White Metal | Cleveland | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| WAWabash Alloys | Cleveland | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| WTWelded Tubes INC | Orwell | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| WTWheatland Tube CO Niles Plant | Niles | OH | Primary Metal Manufacturing331210 | — | ◇ UNVERIFIED |
| WIWillard Industries INC | Cincinnati | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| WPWm. Powell Valve CO. | Cincinnati | OH | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| WIWorthington Industries (formerly Heidtman Steel Products) | Cleveland | OH | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| XFXenia Foundry | Xenia | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| YIYoder Industries INC | Dayton | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| HC"4304 - Holiday City Steel Plant" | Holiday City | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| ALAerolite LLC | Youngstown | OH | Primary Metal Manufacturing331318 | 100-499 | ◐ LIKELY ACTIVE |
| AUAlloy Unlimited Processing LLC | Austintown | OH | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| AEAluminum Extruded Shapes | Cincinnati | OH | Primary Metal Manufacturing331318 | 20-99 | ◐ LIKELY ACTIVE |
| AAAmerican Axle & Manufacturing | Twinsburg | OH | Primary Metal Manufacturing331523 | 100-499 | ◐ LIKELY ACTIVE |
| AHAmerican Heavy Plates | Clarington | OH | Primary Metal Manufacturing331221 | 100-499 | ◐ LIKELY ACTIVE |
| APARI Phoenix Inc | Sharonville | OH | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| ASAstro Shapes LLC | Struthers | OH | Primary Metal Manufacturing331318 | 500+ | ◐ LIKELY ACTIVE |
| BPBar Processing Corp | Wickliife | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| BMBMT Masury | Masury | OH | Primary Metal Manufacturing331210 | 20-99 | ◐ LIKELY ACTIVE |
| BRBulldog Racks of Toronto Inc. | Toronto | OH | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| BWB W Supply Company | Lyons | OH | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| CACast Alloy Products LLC | Avon | OH | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| CSCharter Steel- Fostoria | Rising Sun | OH | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| CCCleveland-Cliffs Corporate Cleveland - Corporate | Cleveland | OH | Primary Metal Manufacturing331110 | 1-19 | ◐ LIKELY ACTIVE |
| CCCleveland Cliffs Coshocton Works | Coshocton | OH | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| CSCleveland-cliffs Steel Corporation | West Chester | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| CSCleveland-Cliffs Steel West Chester Regional Office | West Chester | OH | Primary Metal Manufacturing331110 | 100-499 | ◐ LIKELY ACTIVE |
| CTCleveland-Cliffs Tubular Components - Walbridge | Walbridge | OH | Primary Metal Manufacturing331210 | 100-499 | ◐ LIKELY ACTIVE |
| CSCliffs Steel INC | Cleveland | OH | Primary Metal Manufacturing331110 | — | ◐ LIKELY ACTIVE |
| CCCol-Pump Company | Columbiana | OH | Primary Metal Manufacturing331513 | 20-99 | ◐ LIKELY ACTIVE |
| CBConcast Birmingham Inc | Wakeman | OH | Primary Metal Manufacturing331529 | 20-99 | ◐ LIKELY ACTIVE |
| CBCoopermill Bronzeworks LTD | Zanesville | OH | Primary Metal Manufacturing331529 | — | ◐ LIKELY ACTIVE |
| CSCurtis St | Delaware | OH | Primary Metal Manufacturing331511 | 20-99 | ◐ LIKELY ACTIVE |
| ESEllwood Specialty Metals Company | Stow | OH | Primary Metal Manufacturing331513 | — | ◐ LIKELY ACTIVE |